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KR970008768A - Current Limit Protection Circuit with Hysteresis - Google Patents

Current Limit Protection Circuit with Hysteresis Download PDF

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Publication number
KR970008768A
KR970008768A KR1019950020492A KR19950020492A KR970008768A KR 970008768 A KR970008768 A KR 970008768A KR 1019950020492 A KR1019950020492 A KR 1019950020492A KR 19950020492 A KR19950020492 A KR 19950020492A KR 970008768 A KR970008768 A KR 970008768A
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KR
South Korea
Prior art keywords
circuit
overcurrent detection
hysteresis
overcurrent
current limiting
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Application number
KR1019950020492A
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Korean (ko)
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KR0154824B1 (en
Inventor
최낙식
홍경의
Original Assignee
김광호
삼성전자 주식회사
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Priority to KR1019950020492A priority Critical patent/KR0154824B1/en
Publication of KR970008768A publication Critical patent/KR970008768A/en
Application granted granted Critical
Publication of KR0154824B1 publication Critical patent/KR0154824B1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Semiconductor Integrated Circuits (AREA)

Abstract

이 발명은 히스테리시스(HYSTERSIS) 특성을 갖는 전류제한 보호회로에 관한 것으로서, 더욱 상세하게 말하자면 비교기와 콘덴서의 정전 특성을 이용하여 회로가 감당할 수 있을 정도의 전류가 흐르면 동작하지 않고, 그 이상의 전류가 흐르면 제어하는 히스테리시스 특성을 갖는 전류제한 보호회로에 관한 것이다.The present invention relates to a current limiting protection circuit having hysteresis characteristics. More specifically, the present invention does not operate when a current that can be handled by a comparator and a capacitor is operated. It relates to a current limiting protection circuit having a hysteresis characteristic to control.

과전류가 인가되면, 전류제한 보호회로는 콘덴서(C62) 충전 시간만큼의 히스테리시스 시간으로 지연되어 일시적이고 반복적인 과전류가 집적 회로의 주회로에 인가되었을 때, 불안정한 동작을 피할 수 있고, 또한 과부하 전류에 의한 집적 회로의 소손을 방지할 수 있는 효과를 가진 히스테리시스 특성을 갖는 전류제한 보호회로를 제공할 수 있다.When an overcurrent is applied, the current limiting protection circuit is delayed by a hysteresis time as long as the capacitor C62 charging time, thereby avoiding unstable operation when a temporary and repetitive overcurrent is applied to the main circuit of the integrated circuit, and also overload current. It is possible to provide a current limiting protection circuit having a hysteresis characteristic having an effect of preventing burnout of an integrated circuit.

이 발명의 이러한 효과는 과부하 전류로 소손될 가능성이 있는 모든 집적 회로에서 보호회로로 폭넓게 이용될 수 있다.This effect of this invention can be widely used as a protection circuit in all integrated circuits which are likely to burn out with overload current.

Description

히스테리시스 특성을 갖는 전류제한 보호회로Current Limit Protection Circuit with Hysteresis

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 이 발명의 실시예에 따른 히스테리시스 특성을 갖는 전류제한 보호회로의 상세 회로도이다.2 is a detailed circuit diagram of a current limiting protection circuit having hysteresis characteristics according to an embodiment of the present invention.

Claims (4)

외부 회로에서 과전류가 입력이 되면, 과전류에 의한 일정한 전위를 만들고 상기 전위를 과전류 검출신호로 하여 상기 과전류 검출신호를 출력하는 과전류 검출 회로와, 상기 과전류 검출신호를 입력받아, 전원에 흐르는 전류를 충전 수단에 충전하여 일정한 전위로 유지하게 하는 제1차 제어 회로와, 일단에는 상기 제1차 제어 회로의 상기 충전 수단에서 충전되는 일정한 전위를 입력받고, 다른 일단에는 기준 전압을 입력받아 상기 두개의 전위를 비교하며, 상기 과전류 검출 회로에서 과전류가 검출될 경우, 제어 신호를 출력하는 히스테리시스 비교 회로와, 상기 히스테리시스 비교 회로의 출력을 입력받아 집적 회로상의 주회로에 흐르는 전류의 흐름을 제한하여 주는 제2차 제어 회로와 집적 회로상에 주회로의 기능을 외부로 출력하는 출력 회로로 이루어지는 것을 특징으로 하는 히스테리시스 특성을 갖는 전류제한 회로.When an overcurrent is input from an external circuit, an overcurrent detection circuit that generates a constant potential by overcurrent and outputs the overcurrent detection signal using the potential as an overcurrent detection signal, and receives the overcurrent detection signal and charges a current flowing to a power source. A primary control circuit which charges the means to maintain a constant potential, and at one end receives a constant potential charged by the charging means of the primary control circuit, and at the other end receives a reference voltage and the two potentials When the overcurrent is detected by the overcurrent detection circuit, the hysteresis comparison circuit for outputting a control signal and the second current limiting the flow of current flowing to the main circuit on the integrated circuit by receiving the output of the hysteresis comparison circuit; As an output circuit that outputs the functions of the main circuit to the outside on the difference control circuit and the integrated circuit. And a current limiting circuit having hysteresis characteristics. 제1항에 있어서, 상기 과전류 검출 회로는, 한개의 트랜지스터로 구성하고, 상기 베이스에 해당하는 부분에 저항을 장치하며, 상기 저항에 걸리는 전위를 상기 과전류 검출 신호로 하는 것을 특징으로 하는 히스테리시스 특성을 갖는 전류제한 회로.The hysteresis characteristic according to claim 1, wherein the overcurrent detection circuit comprises one transistor, attaches a resistance to a portion corresponding to the base, and sets the potential applied to the resistance as the overcurrent detection signal. Having current limiting circuit. 제1항에 있어서, 상기 제1차 제어 회로는, 두개의 저항, 한개의 트랜지스터, 콘덴서로 구성되어 상기 과전류 검출 회로에서 과전류 검출 신호가 인가되면, 상기 콘덴서에 전원에서 흐르는 전류를 충전하여 상기 콘덴서 양단에 일정한 전위를 갖게 하는 것을 특징으로 하는 히스테리시스 특성을 갖는 전류제한 회로.The capacitor of claim 1, wherein the primary control circuit includes two resistors, one transistor, and a capacitor, and when an overcurrent detection signal is applied from the overcurrent detection circuit, the capacitor is charged with a current flowing from a power source. A current limiting circuit having hysteresis characteristics characterized by having a constant potential at both ends. 제1항에 있어서, 상기 히스테리시스 비교 회로는, 비반전 입력단에는 상기 콘덴서 양단의 전위를 입력하고, 반전 입력단에는 기준 전압을 입력하여, 상기 과전류 검출 회로인가시 상기 콘덴서의 충전 시간만큼 지연된 이후에 동작하도록 하는, 즉 히스테리시스 특성을 갖도록 하여 동작하는 것을 특징으로 하는 히스테리시스 특성을 갖는 전류제한 회로.2. The hysteresis comparison circuit of claim 1, wherein a potential of both ends of the capacitor is input to a non-inverting input terminal, a reference voltage is input to an inverting input terminal, and is operated after the charging time of the capacitor is delayed when the overcurrent detection circuit is applied. A current limiting circuit having a hysteresis characteristic characterized in that it operates so as to have a hysteresis characteristic. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950020492A 1995-07-12 1995-07-12 Current Limit Protection Circuit with Hysteresis KR0154824B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950020492A KR0154824B1 (en) 1995-07-12 1995-07-12 Current Limit Protection Circuit with Hysteresis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950020492A KR0154824B1 (en) 1995-07-12 1995-07-12 Current Limit Protection Circuit with Hysteresis

Publications (2)

Publication Number Publication Date
KR970008768A true KR970008768A (en) 1997-02-24
KR0154824B1 KR0154824B1 (en) 1998-12-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130091551A (en) * 2012-02-08 2013-08-19 삼성전자주식회사 Variable resistance memory device and write method thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020034688A (en) * 2000-11-03 2002-05-09 안우희 Over current detection apparatus for protecting inverter for use in vehicles
JP4158754B2 (en) * 2004-09-30 2008-10-01 日産自動車株式会社 Overcurrent detection method and detection circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130091551A (en) * 2012-02-08 2013-08-19 삼성전자주식회사 Variable resistance memory device and write method thereof

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Publication number Publication date
KR0154824B1 (en) 1998-12-15

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